2539487749 has 2 divisors, whose sum is σ = 2539487750. Its totient is φ = 2539487748.

The previous prime is 2539487723. The next prime is 2539487803. The reversal of 2539487749 is 9477849352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1846850625 + 692637124 = 42975^2 + 26318^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539487749 - 2³¹ = 392004101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2539487693 and 2539487702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2539487449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269743874 + 1269743875.

It is an arithmetic number, because the mean of its divisors is an integer number (1269743875).

Almost surely, 2^2539487749 is an apocalyptic number.

It is an amenable number.

2539487749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539487749 is an equidigital number, since it uses as much as digits as its factorization.

2539487749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 58.

The square root of 2539487749 is about 50393.3304019490. The cubic root of 2539487749 is about 1364.3172618283.

The spelling of 2539487749 in words is "two billion, five hundred thirty-nine million, four hundred eighty-seven thousand, seven hundred forty-nine".